Isaac Newton's scientific discoveries go online (photos)
The Cambridge University Library today published scanned papers from the famed scientist, including some of the mathematics he developed to arrive at the principles of what are now called "Newtonian physics."
Here's the original cover of Newton's "Waste Book," a notebook in which he developed much of his important work on calculus. He started using the notebook in 1664 when he was away from Cambridge due to the plague.
Newton’s work on optics – from one of his notebooks
In 1670, Newton was researching the refraction of light and developing his theory of color. He demonstrated that a prism could separate white light into a spectrum of colors, and eventually built the first known functional reflecting telescope, today known as the Newtonian telescope.